Re: Occasional Java Comm PortInUseException

From:

Lew <lewbloch@gmail.com>

Newsgroups:

comp.lang.java.programmer

Date:

Mon, 29 Aug 2011 09:01:08 -0700 (PDT)

Message-ID:

<f08bf8cd-3d72-426d-8cd9-e4e916244f27@glegroupsg2000goo.googlegroups.com>

fred wrote:

Lew wrote:

fred wrote:

I am seeing an occasional PortInUseException being thrown by some
driver code that uses the Java serial library. When thrown the
message displays that the port is in use by an unknown Windows
application. The port is definitely not being used by any other
application however. The problem occurs on about 1 out of every 3
reboots. Does anyone have any suggestions on how to solve this?

Your assertion that "the port is definitely not being used by any other =

application" is suspect on the face of it. What makes you so damn certai=
n, especially in the face of that error message?

You also don't quote the error message, which makes it harder to give yo=

u advice.

You might have a port in a TIME_WAIT state, or some other hidden problem=

that looks like the port is in use to your code

Speaking of which, what is your code?
http://sscce.org/
What does netstat tell you at the time of the error?

Note that it is a serial port I am talking about, not a network port.

Well, that's an important point.

What about that SSCCE?

You have to give enough information for someone to help you. It helps if y=
ou spell things out in explicit detail and don't ignore requests for furthe=
r information, like for an
http://sscce.org/

--
Lew